Enter an atomic species: Au Enter a cubic lattice type: fcc Enter a model name: Sim_LAMMPS_ReaxFF_KeithFantauzziJacob_2010_AuO__SM_974345878378_001 Enter a lattice constant (m): 4.165284737944603e-10 Writing phonon.eq.pckl Writing phonon.0x-.pckl Writing phonon.0x+.pckl Writing phonon.0y-.pckl Writing phonon.0y+.pckl Writing phonon.0z-.pckl Writing phonon.0z+.pckl WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 7.587e-09*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 7.587e-09*i)